Guitar



FIG. 1 is a front view of a guitar showing my new design;

FIG. 2 is a side view thereof;

FIG. 3 is an end view thereof;

FIG. 4 is an end view thereof opposite the end view of FIG. 3;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a side view thereof opposite the side view of FIG. 2.

The details shown in broken lines in FIG. 1 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a guitar, as shown and described. 